Dissection of brainstem. Dorsal view. (Caption for "Vestibular nucleus" is visible at left.)
Details
Part of
Medulla
System
Vestibular system
Artery
AICA, PICA
Identifiers
Latin
nuclei vestibulares
MeSH
D014726
NeuroNames
714
NeuroLex ID
birnlex_1337
TA
A14.1.04.242 A14.1.05.425
FMA
72239
Anatomical terms of neuroanatomy
[edit on Wikidata]
The vestibular nuclei (VN) are the cranial nuclei for the vestibular nerve.
In Terminologia Anatomica they are grouped in both the pons and the medulla in the brainstem.
Contents
1Structure
1.1Path
1.2Subnuclei
2See also
3References
4External links
Structure
Path
The fibers of the vestibular nerve enter the medulla oblongata on the medial side of those of the cochlear, and pass between the inferior peduncle and the spinal tract of the trigeminal nerve.
They then divide into ascending and descending fibers. The latter end by arborizing around the cells of the medial nucleus, which is situated in the area acustica of the rhomboid fossa. The ascending fibers either end in the same manner or in the lateral nucleus, which is situated lateral to the area acustica and farther from the ventricular floor.
Some of the axons of the cells of the lateral nucleus, and possibly also of the medial nucleus, are continued upward through the inferior peduncle to the roof nuclei of the opposite side of the cerebellum, to which also other fibers of the vestibular root are prolonged without interruption in the nuclei of the medulla oblongata.
A second set of fibres from the medial and lateral nuclei end partly in the tegmentum, while the remainder ascend in the medial longitudinal fasciculus to arborize around the cells of the nuclei of the oculomotor nerve.
Fibres from the lateral vestibular nucleus also pass via the vestibulospinal tract, to anterior horn cells at many levels in the spinal cord, in order to co-ordinate head and trunk movements.
Subnuclei
There are 4 subnuclei; they are situated at the floor of the fourth ventricle.
Name
Location
Notes
medial vestibular nucleus (dorsal or chief vestibular nucleus)
medulla (floor of fourth ventricle)
corresponding to the lower part of the area acustica in the rhomboid fossa;[citation needed] the caudal end of this nucleus is sometimes termed the descending or spinal vestibular nucleus.
lateral vestibular nucleus or nucleus of Deiters
medulla (upper)
consisting of large cells and situated in the lateral angle of the rhomboid fossa; the dorso-lateral part of this nucleus is sometimes termed the nucleus of Bechterew.
inferior vestibular nucleus
medulla (lower)
superior vestibular nucleus
pons
See also
Vestibular nerve
Vestibulocerebellar syndrome
References
This article incorporates text in the public domain from page 788 of the 20th edition of Gray's Anatomy (1918)
External links
Illustration and text: Bs97/TEXT/P13/intro.htm at the University of Wisconsin-Madison Medical school
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